The cryptographic signature guarantees the file is safe to install and was not tampered
with in any way.

This release does not have a Play Store Description, so we grabbed one from version 2.1.3:

[IMPORTANT] For Kingo SuperUser to work, it requires a ROOTED device. If not, please root your device first with Kingo Android Root (PC or APK version) or other methods you prefer.

Kingo SuperUser is a superuser access management tool for Android devices. After rooting your device, you need an apk installed on your device to manage superuser access for applications that need root permission. You can grant, prompt, or deny root permission requested by applications like Titanium Backup, Greenify, Root Explorer and else. What's more, Kingo SuperUser has integrated a function module, which can help you uninstall bloatware preloaded by carrier or manufacturers, and also user applications.